Measuring the entanglement of bipartite pure states
J. M. G. Sancho, Susana F. Huelga · Physical Review A · 2000
The problem of the experimental determination of the amount of entanglement of a bipartite pure state is addressed. We show that measuring a single observable does not suffice to determine the entanglement of a given unknown pure state of two particles. Possible minimal local measuring strategies are discussed, and a comparison is made on the basis of their best achievable precision.